21150192 has 80 divisors (see below), whose sum is σ = 65749760. Its totient is φ = 5723136.

The previous prime is 21150191. The next prime is 21150203. The reversal of 21150192 is 29105112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4728 + ... + 8040.

It is an arithmetic number, because the mean of its divisors is an integer number (821872).

Almost surely, 2^21150192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21150192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32874880).

21150192 is an abundant number, since it is smaller than the sum of its proper divisors (44599568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21150192 is a wasteful number, since it uses less digits than its factorization.

21150192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350 (or 3344 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 21150192 is about 4598.9337894777. The cubic root of 21150192 is about 276.5485833401.

It can be divided in two parts, 211 and 50192, that added together give a triangular number (50403 = T₃₁₇).

The spelling of 21150192 in words is "twenty-one million, one hundred fifty thousand, one hundred ninety-two".